/**
 * Copyright (c) 2016-2019 人人开源 All rights reserved.
 * <p>
 * https://www.renren.io
 * <p>
 * 版权所有，侵权必究！
 */

package io.renren.modules.job.utils;

import io.renren.common.exception.RRException;
import io.renren.common.utils.Constant;
import io.renren.modules.job.entity.ScheduleJobEntity;
import org.quartz.*;

/**
 * 定时任务工具类
 * @author Mark sunlightcs@gmail.com
 */
public class ScheduleUtils {
	private final static String JOB_NAME = "TASK_";
	
	/**
	 * 获取触发器key
	 */
	public static TriggerKey getTriggerKey(Long jobId) {
		return TriggerKey.triggerKey(JOB_NAME + jobId);
	}
	
	/**
	 * 获取jobKey
	 */
	public static JobKey getJobKey(Long jobId) {
		return JobKey.jobKey(JOB_NAME + jobId);
	}
	
	/**
	 * 获取表达式触发器
	 */
	public static CronTrigger getCronTrigger(Scheduler scheduler, Long jobId) {
		try {
			return (CronTrigger) scheduler.getTrigger(getTriggerKey(jobId));
		} catch (SchedulerException e) {
			throw new RRException("获取定时任务CronTrigger出现异常", e);
		}
	}
	
	/**
	 * 创建定时任务
	 */
	public static void createScheduleJob(Scheduler scheduler, ScheduleJobEntity scheduleJob) {
		try {
			//构建job信息
			JobDetail jobDetail = JobBuilder.newJob(ScheduleJob.class).withIdentity(getJobKey(scheduleJob.getJobId())).build();
			
			//表达式调度构建器
			CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(scheduleJob.getCronExpression())
																	 .withMisfireHandlingInstructionDoNothing();
			
			//按新的cronExpression表达式构建一个新的trigger
			CronTrigger trigger = TriggerBuilder.newTrigger().withIdentity(getTriggerKey(scheduleJob.getJobId()))
												.withSchedule(scheduleBuilder).build();
			
			//放入参数，运行时的方法可以获取
			jobDetail.getJobDataMap().put(ScheduleJobEntity.JOB_PARAM_KEY, scheduleJob);
			
			scheduler.scheduleJob(jobDetail, trigger);
			
			//暂停任务
			if (scheduleJob.getStatus() == Constant.ScheduleStatus.PAUSE.getValue()) {
				pauseJob(scheduler, scheduleJob.getJobId());
			}
		} catch (SchedulerException e) {
			throw new RRException("创建定时任务失败", e);
		}
	}
	
	/**
	 * 更新定时任务
	 */
	public static void updateScheduleJob(Scheduler scheduler, ScheduleJobEntity scheduleJob) {
		try {
			TriggerKey triggerKey = getTriggerKey(scheduleJob.getJobId());
			
			//表达式调度构建器
			CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(scheduleJob.getCronExpression())
																	 .withMisfireHandlingInstructionDoNothing();
			
			CronTrigger trigger = getCronTrigger(scheduler, scheduleJob.getJobId());
			
			//按新的cronExpression表达式重新构建trigger
			trigger = trigger.getTriggerBuilder().withIdentity(triggerKey).withSchedule(scheduleBuilder).build();
			
			//参数
			trigger.getJobDataMap().put(ScheduleJobEntity.JOB_PARAM_KEY, scheduleJob);
			
			scheduler.rescheduleJob(triggerKey, trigger);
			
			//暂停任务
			if (scheduleJob.getStatus() == Constant.ScheduleStatus.PAUSE.getValue()) {
				pauseJob(scheduler, scheduleJob.getJobId());
			}
			
		} catch (SchedulerException e) {
			throw new RRException("更新定时任务失败", e);
		}
	}
	
	/**
	 * 立即执行任务
	 */
	public static void run(Scheduler scheduler, ScheduleJobEntity scheduleJob) {
		try {
			//参数
			JobDataMap dataMap = new JobDataMap();
			dataMap.put(ScheduleJobEntity.JOB_PARAM_KEY, scheduleJob);
			
			scheduler.triggerJob(getJobKey(scheduleJob.getJobId()), dataMap);
		} catch (SchedulerException e) {
			throw new RRException("立即执行定时任务失败", e);
		}
	}
	
	/**
	 * 暂停任务
	 */
	public static void pauseJob(Scheduler scheduler, Long jobId) {
		try {
			scheduler.pauseJob(getJobKey(jobId));
		} catch (SchedulerException e) {
			throw new RRException("暂停定时任务失败", e);
		}
	}
	
	/**
	 * 恢复任务
	 */
	public static void resumeJob(Scheduler scheduler, Long jobId) {
		try {
			scheduler.resumeJob(getJobKey(jobId));
		} catch (SchedulerException e) {
			throw new RRException("暂停定时任务失败", e);
		}
	}
	
	/**
	 * 删除定时任务
	 */
	public static void deleteScheduleJob(Scheduler scheduler, Long jobId) {
		try {
			scheduler.deleteJob(getJobKey(jobId));
		} catch (SchedulerException e) {
			throw new RRException("删除定时任务失败", e);
		}
	}
}
